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Message-Id: <1190693912.27805.289.camel@localhost.localdomain> Date: Tue, 25 Sep 2007 14:18:32 +1000 From: Rusty Russell <rusty@...tcorp.com.au> To: lkml - Kernel Mailing List <linux-kernel@...r.kernel.org> Cc: virtualization <virtualization@...ts.linux-foundation.org>, Andi Kleen <ak@....de>, Jeremy Fitzhardinge <jeremy@...p.org>, Adrian Bunk <bunk@...sta.de> Subject: [PATCH 3/3] Virtualization config cleanup: The real patch 1/3 OK, I screwed up and sent the old 1/3. This was supposed to be 1/3, and there is no 3. I'm stupid. Be nice to get acks from Jeremy and Zach as it's their original penmanship. Cheers, Rusty. --- Normalize config options for guest support 1) Group all the "guest OS" support options together, under a PARAVIRT_GUEST menu. 2) Make those options select CONFIG_PARAVIRT, as suggested by Andi. 3) Make kconfig help titles consistent. Signed-off-by: Rusty Russell <rusty@...tcorp.com.au> --- arch/i386/Kconfig | 33 ++++++++++++++++++++------------- arch/i386/xen/Kconfig | 1 + 2 files changed, 21 insertions(+), 13 deletions(-) diff -r 1c1fc74a471c arch/i386/Kconfig --- a/arch/i386/Kconfig Tue Sep 25 14:05:39 2007 +1000 +++ b/arch/i386/Kconfig Tue Sep 25 14:06:19 2007 +1000 @@ -215,27 +215,44 @@ endchoice endchoice config PARAVIRT - bool "Paravirtualization support (EXPERIMENTAL)" - depends on EXPERIMENTAL + bool depends on !(X86_VISWS || X86_VOYAGER) help - Paravirtualization is a way of running multiple instances of - Linux on the same machine, under a hypervisor. This option - changes the kernel so it can modify itself when it is run - under a hypervisor, improving performance significantly. - However, when run without a hypervisor the kernel is - theoretically slower. If in doubt, say N. + This changes the kernel so it can modify itself when it is run + under a hypervisor, potentially improving performance significantly + over full virtualization. However, when run without a hypervisor + the kernel is theoretically slower and slightly larger. + +menuconfig PARAVIRT_GUEST + bool "Paravirtualized guest support" + help + Say Y here to get to see options related to running Linux under + various hypervisors. This option alone does not add any kernel code. + + If you say N, all options in this submenu will be skipped and disabled. + +if PARAVIRT_GUEST source "arch/i386/xen/Kconfig" config VMI - bool "VMI Paravirt-ops support" - depends on PARAVIRT + bool "VMI Guest support" + select PARAVIRT help VMI provides a paravirtualized interface to the VMware ESX server (it could be used by other hypervisors in theory too, but is not at the moment), by linking the kernel to a GPL-ed ROM module provided by the hypervisor. + +config LGUEST_GUEST + bool "Lguest guest support" + select PARAVIRT + depends on !X86_PAE + help + Lguest is a tiny in-kernel hypervisor. Selecting this will + allow your kernel to boot under lguest. This option will increase + your kernel size by about 6k. If in doubt, say N. +endif config ACPI_SRAT bool diff -r 1c1fc74a471c arch/i386/xen/Kconfig --- a/arch/i386/xen/Kconfig Tue Sep 25 14:05:39 2007 +1000 +++ b/arch/i386/xen/Kconfig Tue Sep 25 14:06:19 2007 +1000 @@ -3,8 +3,9 @@ # config XEN - bool "Enable support for Xen hypervisor" - depends on PARAVIRT && X86_CMPXCHG && X86_TSC && !NEED_MULTIPLE_NODES + bool "Xen guest support" + select PARAVIRT + depends on X86_CMPXCHG && X86_TSC && !NEED_MULTIPLE_NODES help This is the Linux Xen port. Enabling this will allow the kernel to boot in a paravirtualized environment under the diff -r 1c1fc74a471c drivers/lguest/Kconfig --- a/drivers/lguest/Kconfig Tue Sep 25 14:05:39 2007 +1000 +++ b/drivers/lguest/Kconfig Tue Sep 25 14:05:39 2007 +1000 @@ -1,23 +1,18 @@ config LGUEST config LGUEST tristate "Linux hypervisor example code" - depends on X86 && PARAVIRT && EXPERIMENTAL && !X86_PAE && FUTEX - select LGUEST_GUEST + depends on X86 && EXPERIMENTAL && !X86_PAE && FUTEX select HVC_DRIVER ---help--- - This is a very simple module which allows you to run - multiple instances of the same Linux kernel, using the + This is a very simple module called lg.ko which allows you to run + multiple instances of the Linux kernel, using the "lguest" command found in the Documentation/lguest directory. Note that "lguest" is pronounced to rhyme with "fell quest", not "rustyvisor". See Documentation/lguest/lguest.txt. + Usually you would also turn on "Lguest guest support", to create a + kernel which can also boot under lguest. + If unsure, say N. If curious, say M. If masochistic, say Y. - -config LGUEST_GUEST - bool - help - The guest needs code built-in, even if the host has lguest - support as a module. The drivers are tiny, so we build them - in too. config LGUEST_NET tristate - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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